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as prawn said, it basically bases your range on how you've driven for the last 10 miles
if you are only getting 220 out of a tank i'd say your coolant temp was broke - but you've changed that - next thing to check would be the egt (if it has one)
Iv just cracked 28.1mpg lol its killed me but iv done it. I like it when it says 24.2mpg better tho, so i shall be returning to heavy foot syndrome. An ecco to whats already been said, buy a 1.2 hyundai getz as i bet the mpg is better lol.
OK quick question, my petrol light comes on when I have 40 miles left, i was a bit risky today and ended up getting it all the way down to 0 miles on the way home...now this might be a silly question, but when it says 0 miles range left, does it actually mean that, or is there a reserve, if so, how many miles roughly would this give....or is the reserve when the light comes on??
Out of interest, I did another 6 miles on 0 before I got to the petrol station....phew!!!
Oh and on a full tank, I normally and regularly get 400-450 miles using Shell V Power (mainly mway miles)